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/*-
 * #%L
 * marid-fx
 * %%
 * Copyright (C) 2012 - 2017 MARID software development group
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 * #L%
 */

package org.marid.jfx.props;

import javafx.beans.Observable;
import javafx.beans.WeakInvalidationListener;
import javafx.beans.property.SimpleObjectProperty;
import javafx.util.Callback;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class FxObject extends SimpleObjectProperty {

  private final WeakInvalidationListener listener = new WeakInvalidationListener(o -> fireValueChangedEvent());

  public FxObject(@NotNull Callback observables, @Nullable T value) {
    this(observables);
    set(value);
  }

  public FxObject(@NotNull Callback observables) {
    addListener((o, oV, nV) -> {
      if (oV != null) {
        for (final Observable observable : observables.call(oV)) {
          observable.removeListener(listener);
        }
      }
      if (nV != null) {
        for (final Observable observable : observables.call(nV)) {
          observable.addListener(listener);
        }
      }
    });
  }
}